Super unleaded vs standard unleaded

[dubber36]

Why? Apart from the non-issue of a slight cold misfire, it's perfectly fine. The last time I looked, the job was £4-500.

[Aparat]

I worry about the level of detergents etc in the cheapest supermarket fuels and long term what effect that could have on carbon build up. I tend to keep my cars for long term so not an mpg issue and will just use my bus pass occasionally 😄 to keep costs down.

I could be wrong but I don't think it makes any difference for carbon build when post-WLTP GTI PP like yours don't have port injection anymore and because of that, there is no fuel being sprayed on intake valves.

[symonh2000]

Right, today I started an experiment. I ran my car until the light came on and filled up with Esso synergy +99 which is allegedly 0% ethanol.

Price wise it worked out at 7% more expensive than the E10 which I was using before.

I am hoping to break even almost due to getting better MPG, but I won't hold my breath.

In mixed driving before I had been averaging 32.5mpg on the E10 so will report back with my findings.

[dubber36]

Right, today I started an experiment. I ran my car until the light came on and filled up with Esso synergy +99 which is allegedly 0% ethanol.

Price wise it worked out at 7% more expensive than the E10 which I was using before.

I am hoping to break even almost due to getting better MPG, but I won't hold my breath.

In mixed driving before I had been averaging 32.5mpg on the E10 so will report back with my findings.

I did this by mistake in our little 1.2 TSI Polo. Over one tankful, there was no improvement in economy at all. However, some have said that if there are any improvements to be had, they will be seen after 3-4 fill ups.

[symonh2000]

I will just have to see, it is going to be hard to get a fair comparison as the weather is colder now than it was last week when i was running the E10.

In theory you should notice a difference straight away as pure unleaded has a higher energy content, but I can understand why a couple of fills might be needed to gain the best effect.

If nothing else it should help keep the engine innards a bit cleaner, but I am skeptical about that too if I am honest.

[jaceyboy]

Misses got 270 miles from the last tank of E10, shocking

[rowlers]

Misses got 270 miles from the last tank of E10, shocking

Really! I'm on 350, with 70 left on the range...

[Adam T7]

Misses got 270 miles from the last tank of E10, shocking

Does she drive everywhere in 1st?

[symonh2000]

So far my findings are as follows.

Long term average on E10 in mixed drivng 32.5mpg

The average of the last few days doing the same journeys on E0 Esso 28.2mpg

So the E0 might actually be worse.

I cannot detect any difference in performance on my car.

[DrivenToDistraction]

So far my findings are as follows.

Long term average on E10 in mixed drivng 32.5mpg

The average of the last few days doing the same journeys on E0 Esso 28.2mpg

So the E0 might actually be worse.

I cannot detect any difference in performance on my car.

You won't. Nobody does. You are right to be sceptical about the "keeping the engine innards cleaner" bit too.
All marketing hype. This whole debate is characterised by an almost complete lack of proper scientific evidence.